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crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building

🗓️ 04 Aug 2026 10:09:19Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 22 Views

Go crypto x509 and tls have a denial of service flaw from excessive intermediate certificates in chain building.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.8ppc64leaardvark-dns2:1.5.0-2.module+el8.8.0+23884+2031fc78aardvark-dns-2:1.5.0-2.module+el8.8.0+23884+2031fc78.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64aardvark-dns2:1.5.0-2.module+el8.8.0+23884+2031fc78aardvark-dns-2:1.5.0-2.module+el8.8.0+23884+2031fc78.x86_64.rpm
Red Hat Enterprise Linux8.8ppc64lebuildah1:1.29.8-1.module+el8.8.0+24545+b713e821buildah-1:1.29.8-1.module+el8.8.0+24545+b713e821.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64buildah1:1.29.8-1.module+el8.8.0+24545+b713e821buildah-1:1.29.8-1.module+el8.8.0+24545+b713e821.x86_64.rpm
Red Hat Enterprise Linux8.8ppc64lebuildah-debuginfo1:1.29.8-1.module+el8.8.0+24545+b713e821buildah-debuginfo-1:1.29.8-1.module+el8.8.0+24545+b713e821.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64buildah-debuginfo1:1.29.8-1.module+el8.8.0+24545+b713e821buildah-debuginfo-1:1.29.8-1.module+el8.8.0+24545+b713e821.x86_64.rpm
Red Hat Enterprise Linux8.8ppc64lebuildah-debugsource1:1.29.8-1.module+el8.8.0+24545+b713e821buildah-debugsource-1:1.29.8-1.module+el8.8.0+24545+b713e821.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64buildah-debugsource1:1.29.8-1.module+el8.8.0+24545+b713e821buildah-debugsource-1:1.29.8-1.module+el8.8.0+24545+b713e821.x86_64.rpm
Red Hat Enterprise Linux8.8ppc64lebuildah-tests1:1.29.8-1.module+el8.8.0+24545+b713e821buildah-tests-1:1.29.8-1.module+el8.8.0+24545+b713e821.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64buildah-tests1:1.29.8-1.module+el8.8.0+24545+b713e821buildah-tests-1:1.29.8-1.module+el8.8.0+24545+b713e821.x86_64.rpm
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03 Oct 2026 16:14Current
7.3High risk
Vulners AI Score7.3
CVSS 3.17.5
EPSS0.00615
SSVC
CWE-770
go languagecertificate chaindenial of serviceintermediate certificateschain building
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